BMW B58 / S58 Billet Engine Fluid Cap Set Color:Blue 16% airflow improvement over stock

16% airflow improvement over stock

Gain up to 10+ horsepower to the wheels

prolonging engine life and maintaining optimal performance

BMW 323i (2007-2011)

BMW B58 / S58 Billet Engine Fluid Cap Set Color:Blue 16% airflow improvement over stockBundle and SAVE! Choose your color combo to dress up your engine bay! The Precision Raceworks Billet Engine Cap Set is a functional and stunningly stylish way to add a nice touch to any engine bay! These caps come in three color options so there is always a color that will work for you! Black with Billet, Black with Blue, and the Stealth series (all black). Many people don't realize it but the OEM caps have a pressure release valve built into them.